Swing stage platform



April 10, 1956 1 E. DEMPsEY 2,741,513

SWING STAGE PLATFORM Filed May 5, 1952 I 2 Sheets-Sheet l i HI 'Y YHi mnIL WWIHUQ LLOYD E. DEMPSEY /47 7- TDF/vi W April 10, 1956 L. E. DEMPsEY SWING STAGE PLATFORM A2 Sheets-Sheet 2 Filed May- 5, 1952 lIIIII I I //\//&/\/ TUF LLOYD e Dempsey Eyv/ /47 TTD/FA@ United States Patent i SWING STAGE PLATFORM Lloyd E. Dempsey, Portland, Greg.

Application May 5, 1952, Serial No. 286,188

4 Claims. (Cl. 394-5) This invention relates generally to staging and particularly to a swing stage platform.

The main object of this invention is to construct a platform which will be extremely light in proportion to its capacity to withstand loads and shocks.

The second object is to devise a construction which will adapt itself readily to the construction of staging of various dimensions and capacities.

'Ilse third object is to provide an easily attachable and removable trestle which allows the use of the platform at various heights for overhead work and to provide the trestle with casters to make them easily movable.

The fourth object is to construct a platform that can be used on swing stages, step ladders, extension ladders and trestles.

These and other objects are accomplished in the manner set forth in the following specification as illustrated in the accompanying drawings, in which Fig. 1 is a plan of the scaffold with portions broken away.

Fig. 2 is a side elevation of Fig. 1.

Fig. 3 is a bottom view of Fig. 2.

Fig. 4 is a fragmentary perspective looking upward at one end of the scaffold.

Fig. 5 is a section taken along the line 5--5 in Fig. 2.

Fig. 6 is a fragmentary transverse section at a larger scale along the line 6 6 in Fig. 5.

Fig. 7 is a fragmentary perspective showing union of the main longitudinal channels with the tubing elements.

Fig. 8 is a side elevation of the platform mounted on the portable wheeled trestles.

Fig. 9 is a transverse section along the line 9-9 in Fig. 8.

Like numbers of reference refer to the same or similar parts throughout the several views.

Referring in detail to the invention, it is comprised primarily of a one-piece plywood deck 10 preferably preformed when made to allow for the desired camber on the deck. The deck 10 is supported by a plurality of beams 11 which in this case are aluminum shapes of greatest depth at the mid-section and tapering toward the ends 12, across which is placed an end plate 13.

Each beam 11 has its bottom edge 14 extending into a split tube 15 and is joined thereto by the welds 16. Each beam 11 has its ange 17 secured to the deck 10 by means of the rivets 13. The outermost edges 19 of the deck 10 are provided with a binder strip 20.

Between the beams 11 and resting on the tubes 15 are the angle bars 21 which are welded to the beams 11. Reenforcing plates 22 are mounted along the sides of the beams 11.

On the beams 11 are formed the perforated eye pads 23 and 24, the former being nearer the end 13 than are the latter. A pad 25 for a stake (not shown) is also indicated although it forms no part of the present invention.

In order to make the platform adaptable for work on ceilings and walls, I have provided the wheeled trestles shown in Figs. 8 and 9, each of which is comprised of a 2,741,513 Patented Apr. 10, 1956 horizontal axle 26 supported by the caster wheels 27 and having projecting upwardly therefrom a telescopic standard 28 on the upper end of which is secured a horizontal head 29 on whose outer ends is mounted a U-shaped clamp 30, each of which receives an outermost tube 15 while a crank screw 31 passes through the ends of the clamp 30 and through the eye pads 23. Diagonal braces are placed between the axle 26 and the standard 28.

Telescopic braces 32 connect the axle 26 to the brace head 33, to which are secured the U-bolt clamps 34 whose crank screws 35 pass through the ends of the clamps 34 and through the eye pads 24. By the adjustment of the telescopic members 2S and 32, the height of the deck 10 above the floor can be adjusted at will.

From the foregoing it can be seen that every element employed in this construction utilizes the maximum strength of each part to the greatest advantage, thereby giving great strength and safety for light weight at relatively low cost.

It will be understood that various shapes other than tubing could be employed without departing from the spirit of my invention. Tubing appears preferable as it offers the same strength in all directions and when used without the trestles affords a convenient skid which will not resist lateral movement and which will not be easily injured.

I claim:

l. An elongated platform comprising a deck extending the length of the platform, outside and central longitudinal beams extending the length of the platform and secured to the under side of said deck, each beam having a vertical web of greatest depth at the center of the platform and tapering toward the ends of the platform, a transverse horizontal base member under each end of the platform, a standard on each of said base members carrying a transverse horizontal head, supporting means on said head having detachable connections with the outside beams of said platform, and inclined brace means on said base members having supporting means detachably connected with at least one of the central beams.

2. An elongated platform comprising a deck extending the length of the platform, outside and central longitudinal beams extending the length of the platform and secured to said deck, each beam having a vertical web of greatest depth at the center of the platform and tapering toward the ends of the platform, perforated eye pads on said beams adjacent the ends thereof, a transverse horizontal base member under each end of the platform, a standard on each of said base members, a horizontal transverse head member on each of said standards, U-shaped supports for the outside beams of said platform on the outer ends of said head members, an inclined brace on each of said base members, a head on each of said braces having a U-shaped support for a central beam of said platform, and screws on said U -shaped supports passing through said eye pads.

3. An elongated platform comprising a deck extending the length of the platform, outside and central longitudinal beams extending the length of the platform and connected with the under side of said deck, each beam having a vertical web of greatest depth at the center of the platform and tapering toward the ends of the platform, a reinforcing member integral with the lower edge of each beam extending the length of the respective beams, a transverse horizontal base member mounted on Wheels under each end of said platform, a telescopic standard on said base member carrying a transverse horizontal head, means on the outer ends of each head seating said reinforcing members on the outside beams and having detachable connection with said outside beams of the platform, inclined diagonal telescopic braces on said base members, and heads on said braces seating said reinforcing member on a central beam and having detachable connection with said central beam of said platform.

4. An elongated platform comprising a deck extending the length of the platform, outside and central longitudinal beams extending the length of the platform and secured to the 'under side of said deck, each beam having a vertical web of greatest depth at the center of the platform and tapering'toward the ends of the platform, a transverse horizontal base member under each end of said platform, a standard mounted on the center of each base member, a transverse horizontal head on said standard, supporting means on the outside ends of said head connected with the outer beams of the platform, a pair of inclined braces connected at their lower ends with each of said base members on opposite sides of said standard, a transverse horizontal head interconnecting the upper ends of Ieach pair of braces, and means on said last heads connected with two central beams of said platform in longitudinally spaced relation to said supporting means on said rst heads.

UNITED STATES PATENTS Post Aug. 25, 1868 Dithridge July 1, 1890 Williams Dec; 5, 1893 Ettenger June 6, 1905 Turner et al Apr. 17, 1906 Foster Dec. 3, 1907 Pulliam Aug. 4, 1914 Frank Mar. 22, 1921 Hall Oct. 10, 1922 Bushong Aug. 3, 1926 Davidson Oct. 25,1927 Davidson Apr. 21, 1931 Greulich June 7, 1938 Powell .Mar. 28, 1939 Eustis Feb. 11, 1941 Anderson Aug. 3, 1943 Redmond Oct. 10, 1944 

